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Description
Technical data for the ER25 Ø1-0.5 mm collet
| Technical Data | |
|---|---|
| Hole diameter d | 1 mm |
| Outside diameter D | 26 mm |
| Overall length L | 34 mm |
ER25 1 mm collet – precision clamping of micro diameters in an intermediate system with an extended compensation range
The ER25 collet with a range of 0.5-1 mm provides stable clamping of tools with the smallest shank diameters in a system bridging the gap between the compact ER20 and the reinforced ER32. Construction from hardened 65Mn steel with a hardness of 44-48 HRC and compliance with DIN 6499 ensure radial runout does not exceed 0.015 mm. A collapse range of 1 mm allows flexible fitting of microtools with similar shank dimensions.
Key advantages of the ER25 1 mm collet
- Maximum radial runout of 0.015 mm according to DIN 6499 – precision essential for micromachining electronic and jewelry parts
- Clamping range of 0.5-1 mm with 1 mm compensation – the widest tolerance among ER systems for micro diameters
- ER25 system dimensions of 26×34 mm – increased mass effectively damps vibration during precision machining at high rotational speeds
- Hardened 65Mn steel with a hardness of 44-48 HRC – material retains its elastic properties through thousands of clamping cycles
- Full compliance with international standard ISO 15488 – seamless interchangeability with tool holders from reputable machine tool manufacturers
A collet designed for clamping micro milling cutters, diamond engraving tools, precision drills, and miniature countersinks used to machine electronic parts, jewelry components, and model-making components. The ER25 system bridges the gap between ER20 and ER32, offering a range of 1-16 mm while maintaining an optimal balance between overall size and clamping capacity. The design, measuring 26×34 mm, provides better vibration damping than smaller systems, resulting in higher finish quality during micromachining. The choice of specialists requiring precision and stability when working with the smallest tools.
Frequently asked questions
It is used to secure micro milling cutters, diamond engraving tools, precision drills, miniature countersinks, and other tools with a straight shank in the 0.5-1 mm range. A tolerance of 1 mm allows shanks with slightly different diameters to be fitted.
The ER25 design, measuring 26×34 mm, is an optimal intermediate solution between ER20 (21×31 mm) and ER32 (33×40 mm). It provides a clamping range of 1-16 mm with a tolerance of 1 mm, combining moderate overall dimensions with enhanced mechanical rigidity.
The smallest ER11 has dimensions of 11.5×18 mm, the popular ER16 measures 17×28 mm, the medium-sized ER20 has dimensions of 21×31 mm, the intermediate ER25 has a size of 26×34 mm, the reinforced ER32 is identified by dimensions of 33×40 mm, and the industrial ER40 has dimensions of 41×46 mm. The system designation appears on each collet in accordance with DIN 6499.
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Shipping
All orders are delivered by courier company GLS. For orders exceeding 369 PLN gross shipping is FREE
| Courier GLS | Przelew24 / Prepayment | 14,76 zł gross | Delivery time 1 working day |
| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
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